Threesome With Mother In Law Huge Tit Slut Friend And My Endowed Son

My wife and I live in a mobile home behind my mother-in-law's home. My mother-in-law's friend uses my the pool that my mother-in-law has. She has really big tits that my son and I really liked and wished they got exposed while she used the pool. My wife tits are small but she has a curvy body and I caught my son jacking off to his mom while she wore her bikini. That's when I found out he was sort of endowed. He and I played with our cocks when my mother-in-law's friend was over. She had to keep fixing her bikini top from exposing what she was hiding.
She fell asleep in the lounge while sunning herself. My son and I went over to her and had to gently touch her tits without waking her. Suddenly to our surprise she saw our exposed dicks smiling saying, " I get horny too ! " reaching out and grabbing our dicks after her tits came out while reaching out to grab our dicks. " You must be proud of your son's cock it's fairly long ! "
She said to us that she's open to a father-son sex play and fed each of us her mega tit removing her bottom letting me go down on her and get turn on with her stiff clit while my son face sat her sliding his dick between her mega jugs and screwing them. " This old gal wants a very hard orgasm don't stop getting yourself off ! " She held my head down there and switched to holding her jugs around my son's cock. My son and I kept pleasing her until she got her climax.
We all went into the pool nude and was caught by my mother-in-law. " What about me ? I enjoy skinny dipping ! " she said as she jumped into the pool unaware the three of us had sex together.